Income Taxes Reorganization (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Apr. 28, 2012
Jan. 29, 2011
Income Tax Disclosure [Abstract]    
Liability Due To Management Company   $ 0.8
Related Party Tax Expense, Due to Affiliates, Current $ 0.3 $ 4.8